How Could I Detect the Presence of a Passive RFID Chip Implant Within a Human Body?

Would an X-ray suffice for this purpose, or would another type of procedure be necessary?

—Name withheld

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The best way to check for an implant would be to have an X-ray performed. RFID transponders have metal antennas that would show up in an X-ray. You could also look for a scar on the skin. Because the needle used to inject the transponder under the skin would be quite large, it would leave a small but noticeable scar. If you were to find such a mark, you could then attempt to read the tag beneath it, using an off-the-shelf low-frequency (LF) RFID interrogator. However, the tag and reader would need to use the same protocol—if they spoke different languages, then you would not receive a signal back from the transponder.

—Mark Roberti, Founder and Editor,RFID Journal

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